Fanuc | Parameter 1860

Some high-end FANUC controls (31i-B5, 30i-B) offer an optional high-speed reference return that bypasses the dog entirely. In that mode, Parameter 1860 is ignored. However, standard dog-type return remains the default.

For rotary tables (4th/5th axes), set 1860 in degrees per minute. A typical range: 1000–3000 deg/min. Because rotary inertia is lower than linear axes (usually), higher 1860 is acceptable, but watch for mechanical lash. fanuc parameter 1860

Some machines use two dogs (deceleration + limit). Parameter 1860 still applies—the second dog merely provides safety. The speed between dogs is still controlled by 1860. Some high-end FANUC controls (31i-B5, 30i-B) offer an

| Parameter | Function | |-----------|----------| | 1850 | Spindle orientation shift amount (offset) – static zero-point | | 1860 | Orientation gain (stiffness) – dynamic response | | 1861 | Orientation acceleration/deceleration time constant | | 1862 | Orientation completion width (in position check) | | Parameter | Function | |-----------|----------| | 1850

In summary: 1850 sets where the spindle stops; 1860 sets how firmly it holds that stop position.

Fanuc Parameter 1860 (often listed in manuals as N1860 or PRM 1860) is a position gain parameter specifically associated with the spindle orientation circuit. In simple terms, it tells the spindle drive (usually a Fanuc Alpha i series or earlier digital spindle amplifier) how aggressively to correct positional errors when orienting the spindle to a specific angular position (e.g., 0°, 90°, 180°, or 270°).

More precisely, Parameter 1860 defines the proportional gain (Kp) for the spindle’s position control loop during orientation mode. It is a dimensionless integer value, typically ranging from 0 to 3000, though typical operational values fall between 500 and 2000.